IMPDH1 p.Pro208=
c.624C>G · rs758909916 · VCV198755
Conflicting classifications of pathogenicity
Conflicting submitters
Classification
Conflicting classifications of pathogenicity
ClinVar
Review
Conflicting submitters ★☆☆☆
ClinVar · 3 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0733%, afr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
|---|---|---|
| Constraint at this position | ||
| Conservation | phyloP 2.6 | GERP -0.18, phastCons 1 |
| Overall | ||
| CADD | 11.1 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0733%
African / African-American · 55/75,060 alleles
Filtering AF
0.0578%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0522%
Overall
0.00391%
63/1,612,900 alleles · ultra-rare
exomes 28/1,460,518 · genomes 35/152,382 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.0733% | 1,365 |
| Admixed American | 0.00833% | 12,003 |
| Remaining individualsnot grpmax-eligible | 0.0032% | 31,216 |
| European (non-Finnish) | 8.47e-05% | 1,180,011 |
Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.
Variant & gene context
- Gene
- IMPDH1
- Protein
- p.Pro208=
- Coding
- c.624C>G
- MANE Select
- NM_000883
- dbSNP
- rs758909916
- Type
- single nucleotide variant
- Location
- chr7:128400495 (GRCh38)
- Gene constraint
- LOEUF 0.763 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 92.71 · 18 PDB
- Residue 208
- the cbs 2 domain; a β-strand
Similar variants
- IMPDH1 p.Arg309Pro Pathogenic/Likely pathogenic ★★ same type
- IMPDH1 p.Asp311Asn Pathogenic/Likely pathogenic ★★ same type
- IMPDH1 p.Asp311Gly Pathogenic/Likely pathogenic ★★ same type
- IMPDH1 p.Leu270Arg Likely pathogenic ★★ same type
- IMPDH1 p.Lys314Asn Pathogenic/Likely pathogenic ★★ same type
- IMPDH1 p.Lys323Arg Pathogenic/Likely pathogenic ★★ same type
- IMPDH1 c.1075-3C>T Uncertain significance ★★ same type
- IMPDH1 c.1551-5C>A Uncertain significance ★★ same type
Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →
Cite Sugi Variant
Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/impdh1-p-pro208 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown